Allow to DRAG the visible soundwave as any sound editing program does. I know this is not a SEP, but the slider knob is too narrow/inexact for this purpose (1 pixel slider knob movement is too big (time wise) for a typical movie: a 600 pixels slider for a 90 min movie amounts to 9 seconds/pixel and the useful zooming level is around 3/4 secs of sound so 1 pixel movement amounts to around three pages of soundwave)